Jason Lowe created YARN-5341:
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Summary: Nodemanager leaks ContainerResource names in UniqueNames for each container
Key: YARN-5341
URL: https://issues.apache.org/jira/browse/YARN-5341
Project: Hadoop YARN
Issue Type: Bug
Components: nodemanager
Affects Versions: 2.7.2
Reporter: Jason Lowe
Priority: Critical
Ran across a nodemanager that was spending most of its time in GC. Upon examination of the
heap most of the memory was going to the map of names in org.apache.hadoop.metrics2.lib.UniqueNames.
In this case the map had almost 2 million entries. Looking at a few of the map showed entries
like "ContainerResource_container_e01_1459548490386_8560138_01_002020", "ContainerResource_container_e01_1459548490386_2378745_01_000410",
etc.
Looks like the ContainerMetrics for each container will cause a unique name to be registered
with UniqueNames and the name will never be unregistered.
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